Harry headley



(No Model.)v

. H. HEADLEY.

MANUFAGTURE OF KNOB MOLDS.

Patented July 7, 1891.`

No. 455,400.V

any@ M? Y UNITED STATES PATENT OFFICE.

HARRY HEADLEY, or EAST LIvERPooL, R10, AssIeNoR To H. BRUNT a son, or sAMn PLAcE.

MANUFACTU RE OF KNOB-MOLDS.

SPECIFICATION forming part 0f Letters Patent 455,400, dated July 7, 1891. v

Application iiled February 17, 1891. Serial No. 381,762. (No model.)

T0 all 1071/0111/ it may @0W/067%.' of the outer casing 8 is filled with a suitable Be it known that I, HARRY HEADLEY, a mixture of plaster-of-paris and the top 55 citizen of the United States, residing at East smoothed oft evenly. This portion of the Liverpool, in the county of Columbiana and apparatus is placed in an outer casing 10,

State of Ohio, have invented certain new provided with lugs 1l, for the purpose of atand useful Improvements in Running Knobtaching the same by means of bolts to a top Molds; andIdo'hereby declare the following board 12. After the plaster has become 6o to be a full, clear, and exact' description of hardened the set-screws 2 and 7V are removed, the invention, such as will enable others which will permit the withdrawal of the base- Io skilled in the art to which it pertains to board 1. i

make and use the same, reference being had Another apparatus is formed in the same to the accompanying drawings, which form a manner as before described for the lower 65 part of this specification. half of the mold, except that the semicircu- My invention relates to an improved aplar piece in this case is not provided with an l paratus for forming mold-boxes for the manopening for the cylindrical plug 4. This ufacture of door-knobs; and it consists in last-mentioned device is attached by bolts to certain details of construction and combinaa base-board 13 and the base-board 1 re- 7c tion of parts, as will be fully set forth heremoved, as before described. These two inafter. parts of the mold are attached by a hinge 14, zo In the accompanying drawings, Figure 1 is which will permit the two partslof the mold a plan view of a mold formed by my imto be separated and brought accurately toproved apparatus, having the top portion regether. 75 moved. Fig. 2 is a sectional side elevation In operation the upper half of the mold is of the same. Fig. 3 is side sectional elevarevolved backand a small piece of plastic 2 5 tion of the apparatus used to form the upper clay suitable for the purpose placed in the half of the above-described mold. Fig. 4 is mold. The upper half is now revolved back a plan view of the'same. Fig. 5 is a vsectoits former position andapressure applied. 8o

tional view similar to Fig. 3, for the purpose The waste or surplus clay being sheared by of forming the lower halt of the mold. the rings 5 drops into the space formed by 3o To put my invention into practice I prothe two angular rings 6.

vide a circular base-board 1, of a suitable By means of this apparatus various sizes size and form of construction, and attach of door-knobsmay be produced, as the pieces 85 thereto, by means of a set-screw 2, a semi- 3, 5, and 6 may be removedand larger or l circular piece 3, equal in form to the onesmaller sizes substituted. 1 half of a door-knob and having a circular Having thus described my invention, I

opening in the top of the same. Placed in claima this opening is a cylindrical plug 4, which The herein-described apparatus for manu- 9o forms a recess in the door-knob to which the facturing door-knob molds, consisting ot the iron shank of the same is attached. Surcasing 8, a base-board to center the same, the 4o rounding this semcircular piece is an annuangular rings 6, detachably secured to said lar metallic ring 5, which is slightly larger base-board, the deep cylindrical ring 5, placed in diameter than the piece 3 and serves to inside said angular ring, the form 3 and a 95 shear the surplus clay from the mold proper. means for attaching the same to the base- Encircling this ri'ng 5 is another 6, angular board l, and the cylindrical plug 4, connected in cross-section and held in position by to the form 3, substantially as set forth and means of set-screws '7. This angular ring described forms a portion of the waste-clay space. In testimony-thatI cla-im the foregoing I roo Surrounding this last-described angular-ring hereunto affix my'signature this 17th day of 6 is a flanged casing S, which is centered by January, A. D. 1891.

5o an upwardly-projecting flange 9, formed in- HARRY HEADLEY. [L s] tegral with the base-board l. After these In presence ofseveral pieces have been arranged as above O. C. LEE,

described the entire space to the top or levelv M. E. HARRISON. 

